21385408

素因数分解:

$2^6\times {\mathrm{11}}^1\times {\mathrm{37}}^1\times {\mathrm{821}}^1$

素因数の和:881

約数の個数: 56

約数和(自身を含む): 47603664

約数和(自身を除く): 26218256

約数列:

[1, 2, 4, 8, 11, 16, 22, 32, 37, 44, 64, 74, 88, 148, 176, 296, 352, 407, 592, 704, 814, 821, 1184, 1628, 1642, 2368, 3256, 3284, 6512, 6568, 9031, 13024, 13136, 18062, 26048, 26272, 30377, 36124, 52544, 60754, 72248, 121508, 144496, 243016, 288992, 334147, 486032, 577984, 668294, 972064, 1336588, 1944128, 2673176, 5346352, 10692704, 21385408]

約数ペア:

[(1, 21385408), (2, 10692704), (4, 5346352), (8, 2673176), (11, 1944128), (16, 1336588), (22, 972064), (32, 668294), (37, 577984), (44, 486032), (64, 334147), (74, 288992), (88, 243016), (148, 144496), (176, 121508), (296, 72248), (352, 60754), (407, 52544), (592, 36124), (704, 30377), (814, 26272), (821, 26048), (1184, 18062), (1628, 13136), (1642, 13024), (2368, 9031), (3256, 6568), (3284, 6512)]